OFDM for Terahertz Wireless Communication Systems
159
Fig. 10 Orthogonal
subcarrier in frequency
domaine
10
6
10
7
10
8
-50
-40
-30
-20
-10
0
Bu
Bu/N
Frequency in Hz
H(f) in dB
Fig. 11 Frequency response of a frequency-selective channel
7.1.4 Equalization
Channel equalization in OFDM is digital and simple due to the presence of the cyclic
prefix. Moreover, channel coding technics connected with interleaving between
frequencies achieves the performance of plat channel. This technique which is
COFDM is used in particular by the DVB-T standard used in France for digital
terrestrial television.
159
Fig. 10 Orthogonal
subcarrier in frequency
domaine
10
6
10
7
10
8
-50
-40
-30
-20
-10
0
Bu
Bu/N
Frequency in Hz
H(f) in dB
Fig. 11 Frequency response of a frequency-selective channel
7.1.4 Equalization
Channel equalization in OFDM is digital and simple due to the presence of the cyclic
prefix. Moreover, channel coding technics connected with interleaving between
frequencies achieves the performance of plat channel. This technique which is
COFDM is used in particular by the DVB-T standard used in France for digital
terrestrial television.